I have replaced the distribitor cap, points, plugs, wires, coil, batt, alt, and vol regulator. The car runs and drives great! Always started right up. But now when I try to start it, it will only crank. It will turn over and over, but wont fire up. I have checked the wires, distr cap, points, and all my conections. But I can't figure it out? Can you help me please get my car running again?